The 85 - 190 metre wide asteroid 2011 UU made a close pass (65.8 lunar distances, 0.1692 AU), travelling at 6.89 km/second, to the Earth-Moon system on the 17th October, 2011 @ 13:31 UT ±2 days 03:45.
Orbital elements:
2011 UU Earth MOID = 0.1431 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 347.81747 (2000.0) P Q
n 0.22809924 Peri. 174.41028 +0.86286007 -0.50065397
a 2.6528956 Node 215.90493 +0.45902816 +0.83368578
e 0.5710760 Incl. 6.79759 +0.21157896 +0.23305284
P 4.32 H 22.5 G 0.15 U 8